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<div class="titlepage"><div><div><h4 class="title">
<a name="asio.reference.io_context.run_one_for"></a><a class="link" href="run_one_for.html" title="io_context::run_one_for">io_context::run_one_for</a>
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<p>
          <a class="indexterm" name="asio.indexterm.io_context.run_one_for"></a> 
Run the <a class="link" href="../io_context.html" title="io_context"><code class="computeroutput">io_context</code></a> object's
          event processing loop for a specified duration to execute at most one handler.
        </p>
<pre class="programlisting">template&lt;
    typename Rep,
    typename Period&gt;
std::size_t run_one_for(
    const chrono::duration&lt; Rep, Period &gt; &amp; rel_time);
</pre>
<p>
          The <code class="computeroutput">run_one_for()</code> function blocks until one handler has been
          dispatched, until the <a class="link" href="../io_context.html" title="io_context"><code class="computeroutput">io_context</code></a>
          has been stopped, or until the specified duration has elapsed.
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<h6>
<a name="asio.reference.io_context.run_one_for.h0"></a>
          <span><a name="asio.reference.io_context.run_one_for.parameters"></a></span><a class="link" href="run_one_for.html#asio.reference.io_context.run_one_for.parameters">Parameters</a>
        </h6>
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<dt><span class="term">rel_time</span></dt>
<dd><p>
                The duration for which the call may block.
              </p></dd>
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<a name="asio.reference.io_context.run_one_for.h1"></a>
          <span><a name="asio.reference.io_context.run_one_for.return_value"></a></span><a class="link" href="run_one_for.html#asio.reference.io_context.run_one_for.return_value">Return Value</a>
        </h6>
<p>
          The number of handlers that were executed.
        </p>
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<td align="right"><div class="copyright-footer">Copyright &#169; 2003-2018 Christopher M. Kohlhoff<p>
        Distributed under the Boost Software License, Version 1.0. (See accompanying
        file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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